A medium-sized terrestrial herb with a very short stem. Leaves distichous, oblongelliptic, with a minutely tridenticulate apex, up to 18 cm long, 4 cm wide, with sparsely ciliate basal margins, tessellated pale and dark green above. Inflorescence erect, 1–flowered, up to 34 cm long; peduncle sparsely pubescent, green with purple markings; bract ovate, to 3 cm long, sparsely pubescent, ciliate. Dorsal sepal ovate, acute, 3.5–4 cm long, 3.1–3.3 cm wide, white or pinkish, lined with dark purple or purple-green veins. Synsepal ovate, acute, 3.2 cm long, 1.5–2.5 cm wide, white, tinged purple with purple and green veins. Petals spreading-reflexed, ligulate-oblanceolate, tridentate at apex, 4.3–5.1 cm long, 1.4–2 cm wide, sparsely ciliate and pubescent at base, green below, purple above, veined with and spotted dark purple in basal half. Lip deeply saccate, prominently auriculate, dentate or apiculate at apex, 3.8–4 cm long, 2.3–2.6 cm wide, minutely pubescent, ciliate, bronze or olive-green with darker veins. Staminode obovate, 10 mm long, 9 mm wide, minutely pubescent, distal margin 3-toothed, midtooth longer than the two lateral, pale green tinged with bronze or green.